Federal authorities are trying to extradite former Chicago comptroller Amer Ahmad from Pakistan to face sentencing in a bribery scheme in Ohio he took part in before coming to work for Mayor Rahm Emanuel.

Ahmad fled in April to Pakistan, where he was charged with trying to enter the country on a fake Mexican passport. He remains in custody there.

In a filing Wednesday in U.S. District Court in Columbus, Assistant U.S. Attorney Douglas Squires argues Ahmad should be brought back to pay for his crimes in Ohio. But Pakistani authorities have said they may try to send him to prison for the passport scam. He faces seven years behind bars in Pakistan, according to authorities there.

Ahmad's apprehension in Pakistan came about a week after his wife filed a request for an order of protection in Cook County in which she alleged her husband told her to get him a fake birth certificate from Pakistan so he could get a passport.

The U.S. Marshals Service then announced they were looking for Ahmad on an arrest warrant for violating terms of bail in the fraud case, in which he pleaded guilty to participating in a kickback scheme while deputy state treasurer in Ohio prior to being hired by Emanuel as comptroller in 2011. Ahmad pleaded guilty in December to bribery and conspiracy to commit bribery, money laundering and wire fraud, months after he abruptly stepped down from his top job in the Emanuel administration. Ahmad was indicted weeks after he resigned.

Federal prosecutors in Ohio said while he was deputy state treasurer there, Ahmad gave state investment work to a former high school classmate in exchange for having $400,000 funneled to a landscaping company in which Ahmad was a part owner. An additional $123,000 was funneled through a friend and business associate of Ahmad's, prosecutors said.

Emanuel said he didn't know anything about the federal investigation of Ahmad until he got word of Ahmad's indictment. After Ahmad was indicted, Emanuel brought in an outside law firm and an accounting firm to audit his work for the city. A report issued by those firms last year said there was no indication Ahmad committed any wrongdoing at Chicago's City Hall.